Abstract
The existence of kink waves and periodic waves for a perturbed defocusing mKdV equation is established by using geometric singular perturbation theory. In addition, by analyzing the perturbation of the Hamiltonian vector field with an elliptic Hamiltonian of degree four, a two saddle cycle is exhibited. It is proven that the wave speed \(c_0(h)\) is decreasing on \(h\in [-3/4,0]\) by analyzing the ratio of Abelian integrals and the limit of wave speed is given. Furthermore, the relationship between the wave speed and the wavelength of traveling waves is obtained.
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This work are supported by the National Natural Science Foundation of China (No. 11671107), Guangxi Natural Science Foundation (No. 2015GXNSFBA139004 and No. 2016GXNSFDA380031) and the Innovation Project of GUET Graduate Education (No.2016YJCX47).
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Chen, A., Guo, L. & Huang, W. Existence of Kink Waves and Periodic Waves for a Perturbed Defocusing mKdV Equation. Qual. Theory Dyn. Syst. 17, 495–517 (2018). https://doi.org/10.1007/s12346-017-0249-9
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DOI: https://doi.org/10.1007/s12346-017-0249-9